2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 204Get this manual

2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 204

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CYLINDER HEADVALVE Remove the tensioner lifter sealing bolt and washer
After '05: Turn the cam chain tensioner lifter shaft clockwise fully and secure it with the special tool to loosen the tens